Question

some tools have various levels of graduations. for example, a ruler may have graduations for both millimeters and centimeters. when measuring the length of an earthworm, which graduations would allow for the most accurate measurement?
millimeters
centimeters
decimeters
meters

Explanation:

Smaller units of measurement provide more precision. Millimeters are the smallest among the given options, so they will give the most accurate measurement for an earthworm's length.

Answer:

A. millimeters